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Articles by Mayank Agarwal
Page 27 of 31
Node.js – util.types.isUint8ClampedArray() Method
The util.types.isUint8ClampedArray() method checks whether the passed value is a built-in Uint8ClampedArray instance or not. If the above condition is satisfied, it returns True, else False.Syntaxutil.types.isUint8ClampedArray(value)Parametersvalue − This input value takes input for the required parameter and checks if it's a Uint8ClampedArray instance or not.It returns True or False based upon the input value passed.Example 1Create a file with the name "isUint8ClampedArray.js" and copy the following code snippet. After creating the file, use the command "node isUint8ClampedArray.js" to run this code.// util.types.isUint8ClampedArray() Demo Example // Importing the util module const util = require('util'); // Passing normal Int8-Array as input ...
Read MoreNode.js – util.formatWithOptions() method
The util.formatWithOptions() method works in the same way as the util.format() method. The only difference between the two is that the formatWithOptions() method takes an inspectOptions argument that specifies options that are passed along the util.inspect() method.Syntaxutil.formatWithOptions(inspectOptions, format, [args])ParametersThe parameters are defined below:inspectOptions − These options will be used to inspect the object passed along this method.format − This parameter takes input for the format type of the input value passed.Example 1Create a file with the name "formatWithOptions.js" and copy the following code snippet. After creating the file, use the command "node formatWithOptions.js" to run this code.// Node.js util.formatWithOptions() method ...
Read MoreNode.js – util.types.isArgumentsObject() Method
The util.types.isArgumentsObject() method checks whether the passed value is an arguments object or not. If the above condition is satisfied, it returns True, else False.Syntaxutil.types.isArgumentsObject( value )Parametersvalue − This input parameter takes input for the required parameter and checks if it's an arguments object or not.It returns True or False based upon the input value passed.Example 1Create a file with the name "isArgumentsObject.js" and copy the following code snippet. After creating the file, use the command "node isArgumentsObject.js" to run this code.// util.types.isArgumentsObject() Demo Example // Importing the util module const util = require('util'); // Passing the arguments object ...
Read MoreNode.js – Reading Path Parameters from URL
We can embed path variables into the URL and then use these path parameters to retrieve info from resources. These API endpoints have different values with respect to different values passed inside them.Example 1Create a file named "index.js" and copy the following code snippet. After creating the file, use the command "node index.js" to run this code.// Reading Path parameters in Node.js // Importing the below modules const express = require("express") const path = require('path') const app = express() var PORT = process.env.port || 3001 app.get('/p/:tagId', function(req, res) { console.log("TagId received is : " + req.params.tagId); ...
Read MoreNode.js – util.types.isGeneratorObject() Method
The util.types.isGeneratorObject() method checks whether the passed value is a built-in generator object or not. If the above condition is satisfied, it returns True, else False. The return value may differ from the original source code if a transpilation tool is used.Syntaxutil.types.isGeneratorObject(value)Parametersvalue − This input value takes input for the required parameter and checks if it's a Generator object or not.It returns True or False based upon the input value passed.Example 1Create a file "isGeneratorObject.js" and copy the following code snippet. After creating the file, use the command "node isGeneratorObject.js" to run this code.// util.types.isGeneratorObject() Demo Example // Importing the ...
Read MoreNode.js – util.types.isDataView() Method
The util.types.isDataView() method checks whether the passed value is a built-in DataView instance or not. If the above condition is satisfied, it returns True, else False.Syntaxutil.types.isDataView(value)Parametersvalue − This input value takes input for the required parameter and checks if it's a Data View instance or not.It returns True or False based upon the input value passed.Example 1Create a file named "isDataView.js" and copy the following code snippet. After creating the file, use the command "node isDataView.js" to run this code.// util.types.isDataView() Demo Example // Importing the util module const util = require('util'); const buffer = new ArrayBuffer(20); // ...
Read MoreNode.js – util.types.isBigInt64Array() Method
The util.types.isBigInt64Array() method checks whether the passed value is a BigInt64Array instance or not. If the above condition is satisfied, it returns True, else False.Syntaxutil.types.isBigInt64Array(value)Parametersvalue − This input value takes input for the required parameter and checks if it's a BigInt64 array instance or not.It returns True or False based upon the input value passed.Example 1Create a file named "isBigInt64Array.js" and copy the following code snippet. After creating the file, use the command "node isBigInt64Array.js" to run this code.// util.types.isBigInt64Array() Demo Example // Importing the util module const util = require('util'); // Functions to be passed as parameter // ...
Read MoreNode.js – util.isDeepStrictEqual() Method
The util.isDeepStrictEqual() method as the name suggests, is used for checking whether the two values are deep strict equal or not. If both the values are deep strict equal, true is returned else it returns false.Syntaxutil.isDeepStrictEqual(val1, val2)Parametersval1 & val2 – Both the input parameters can accept class, function, object or a JavaScript primitive value. The above function checks the equality between these two values.Example 1Create a file with the name "deepStrictEqual.js" and copy the following code snippet. After creating the file, use the command "node deepStrictEqual.js" to run this code.// util.isDeepStrictEqual() Demo Example // Importing the util module const util = require('util'); ...
Read MoreNode.js – util.types.isBoxedPrimitive() Method
The util.types.isBoxedPrimitive() method checks whether the passed value is a built-in Primitive object or not. If the above condition is satisfied, it returns True, else False. Primitive object includes new Boolean(), new String() or Object(Symbol()).Syntaxutil.types.isBoxedPrimitive(value)Parametersvalue − This input value takes input for the required parameter and checks if it's a Float32-Array instance or not.It returns True or False based upon the input value passed.Example 1Create a file with the name "isBoxedPrimitive.js" and copy the following code snippet. After creating the file, use the command "node isBoxedPrimitive.js" to run this code.// util.types.isBoxedPrimitive() Demo Example // Importing the util module const util ...
Read MoreNode.js – util.callbackify() Method
The util.callbackify() method takes an async function as a parameter (or a function with Promise) and returns a function with the callback style. The callback will hold the rejection reason as the first parameter (or null in case of Promise) and the resolved value as the second parameter.Syntaxutil.callbackify(function)Parametersfunction − The input parameter for the async_function required for callback.Example 1Create a file "callbackify.js" and copy the following code snippet. After creating the file, use the command "node callbackify.js" to run this code.// util.callbackify() demo example // Importing the util module const util = require('util'); // Defining a simple async function ...
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